hmmm I'm not sure about Japan on this point, since I haven't communicated with Japanese developers very frequently.

But regarding Korea and China: in China, there's Gitee, which has a very robust open source environment, but it's not really 'Western style open source' it's more like corporate projects being made publicly available for free. In other words, companies release assignments and people gather to work on them. That's the dominant model. (And that becomes part of their employment portfolio. So it feels very much like an incubation system for corporate projects.)

For Korea, I think it's largely because the absolute number of Korean speakers is smaller than English speakers. As a result, Korea's tech infrastructure generally lags behind the English speaking world. It feels like: English trends emerge -> a few years later, once they stabilize, Korea starts adopting them!

The usual pattern here is that the people curating these English trends for Korea are Koreans who have worked at FAANG-like companies and come back, so they have a strong influence. But I don't necessarily agree with their perspectives, which is why I came here to see what the raw data from the West actually looks like.

On top of that, Korea's IT projects are mostly government-led (because the domestic market isn't that large), so the government essentially acts as a VC. And within this government-led incubation system, only the final winner takes everything. Given that kind of environment, I wonder if that's why open source doesn't really take off.